Need a appraisal on sports cards?

Many factors - age, condition, etc.

You can get books to help or even take to a memorabilia shop for appraisals. You can also peruse e-bay and other such sites for like cards so you know what people are paying.

Something is only worth what someone else will pay you for it.

sports cards are becoming less and less valuable with time. Kids are in to other things these days than the good ol' days of trading baseball cards. I'm 24 and I have thousands of sports cards including rookies of Emmitt Smith, Brett Farve, Barry Bonds and so on, but I don't know a single person who would give me more than a couple hundred bucks for everything. My advice, put your money into some bonds and mutual funds or something.

Maybe about 25 bucks. Not as much as you think. It is worth keeping just to have it. I have a Bobby Murcer card, he was my baseball hero when I was a kid. So, i keep the card, it is worth a million bucks TO ME.